Improvement in lamp-chimneys



G'RACIE & BOYD.

Lamp Chimny.

4 Patented VJuly 28, 1868.n

No. 89,282.V

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JOHNy GRACIE, OF PITTSBURG, AND ROBERT H. BOYD, OF HULTO'N STATION,

IENNSYLVANIA.

Letters Patent No. 80,282, dated July 28, 1868.

IMPROVEMENT IN LAMPnHIMNYs.

To ALL WHOMv 1T MAY CONCERN:

- Be it known'that we, JOHN Galicia, of Pittsburg, and ROBERT H. BOYD, of Hulten Station, in the county of VAllegheny, and State of Pennsylvania, have'invented a new and useful Improvement in Lamp-Tops; and we do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, and to the letters of reference marked thereon.

The nature of our invention consists in providingpa. lamp-chimney with an elliptical flange, and, in combination with such flange, a lamp-top vprovided with a ange, portions of which project inward, for the purpose of catching, grasping, and holding the chimney in position the contour of said ange corresponding to the form of the ange of thelamp-chimney.

To enable others skilled in the art to make and use our invention, we will proceed to describe its construction and. operation. I

In the accompanying drawings, which form part of this specification- Figure 1 is a vertical section Yof the lamp-chimney and top providedwith our improvement:

Figure 2 is a top view of a lamp-top provided with our improvement in the flange for catching and holdingthe chimney in position. f

Figure 3 is a bottom view of the elliptical iange of the lamp-chimney.

We construct our lamp-chimney and lamp-top in any ot' the known forms, with the exceptionpf the tiangey on the bottom of the chimney, and the flange of the lamp-top.

The flange, D, of 4the lamp-chimney A ismade elliptical, as shown in fig. 1', which form of lange may be made in moulds, or by the ordinary hand manipulations of the workman. The ilange ofthe lamp-top B is provided with two inward-projecting portions marked C, which are so arranged with relation to each other, and to` the ange D ofthe lamp-chimney A, that they will catch over the flange and bind the chimney {rmly to its seat on the lamp-top. Y l

The inward projections C of thelamp-top B are so arranged as to form a wedgeshaped or tapering recess for the reception of the wide portion X ofthe Harige D of the chimney A, so that, when the chimney is placed on the lamp-top B, and turned about one-fourth way round, the' projection C will bind on the Wide portions X of the fla-nge D. By thus constructing the iiangc'of the chimney, and adapting the ange of the lamp-topv to itv in the manner described, and as represented' in the accompanying drawings, the chimney willbe held firmly to its place, without liability of becoming displaced by any ordinary handling of the lamp. The projecting portions C of the l amptop should be made so that they will yield to any undue expansion of the chimney or lamptop. V

The advantages of our improvement. in chimney and iamp-top consist in their adaptation to any of the 'known forms of lamp-chimneys, also in the speed, ease, and facility of Vsecuring the chimney on` and to the lamp-top in a safe and secure manner. i

We wish it clearly understood that we do not claim broadly a lamp-chimney with an elliptical or ouvalbase provided with a. flange; neither do we claim broadly a lamp-top adapted to a chimney having an oval or ellipticalformed base, for such devices are known and patented. I

Having thus described the nature, construction, and operation of our improvement, what we claim as of our invention, isl l 1. Iroviding a lamp-chimney with an elliptical flange, substantially as herein described.

2. In combination with the above, a lamp-top provided with a ange, portions of which project inward`for the purpose oi' catching, grasping, andholding the chimney in position, the contour of saidilange corresponding to the form of the ange of the lamp-chimney, substantially as herein described, and for the purpose set forth. JOHN GRACIE,

ROBERT Hr BOYD.

Witnesses:

A. C. Jonssron, JAMES, J. JoHNs'rox. 

